<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
	<style type="text/css">
		.box1{
			width:100px;
			height:100px;
			background: black;
			border:25px solid red;
			position: absolute;
			left:150px;
			top:150px;
			z-index:3;
		}
		.box2{
			width:200px;
			height:200px;
			background: black;
			border:50px solid red;
			position: absolute;
			left:75px;
			top:75px;
			z-index:2;
		}
		.box3{
			width:350px;
			height:350px;
			background: black;
			border:50px solid red;
			position: absolute;
			left:0;
			top:0;
			z-index:1;
		}
		
	</style>
	</head>
	<body>
		<div class="box1"></div>
		<div class="box2"></div>
		<div class="box3"></div>
			
		
	</body>
</html>
